Operation Manual

Chapter 6: Sequence Graphing 112
• Quick Zoom applies to all directions. To center the viewing window on the current cursor location
after you have moved the trace cursor, pressÍÍ. The trace cursor returns to nMin.
In Web format, the trail of the cursor helps identify points with attracting and repelling behavior in the
sequence. When you begin a trace, the cursor is on the x-axis at the initial value of the first selected
function.
Note: To move the cursor to a specified
n during a trace, enter a value for n, and press Í. For
example, to quickly return the cursor to the beginning of the sequence, paste
nMin to the n= prompt
and press Í.
Moving the Trace Cursor to Any Valid n Value
To move the trace cursor to any valid n value on the current function, press r and enter the
number. When you enter the first digit, an
n= prompt and the number you entered are displayed in the
bottom-left corner of the screen. You can enter an expression at the
n= prompt. The value must be valid
for the current viewing window. When you have completed the entry, press Í to move the cursor.
ZOOM
ZOOM operations in Seq graphing work the same as in Func graphing. Only the X (Xmin, Xmax, and
Xscl) and Y (Ymin, Ymax, and Yscl) window variables are affected.
PlotStart, PlotStep, nMin, and nMax are only affected when you select ZStandard. The VARS Zoom
secondary menu ZU items 1 through 7 are the ZOOM MEMORY variables for Seq graphing.
CALC
The only CALC operation available in Seq graphing is value.
• When Time axes format is selected,
value displays Y (the u(n) value) for a specified n value.
• When Web axes format is selected,
value draws the web and displays Y (the u(n) value) for a
specified
n value.
•When
uv, vw, or uw axes format is selected, value displays X and Y according to the axes format
setting. For example, for
uv axes format, X represents u(n) and Y represents v(n).
Evaluating u, v, and w
To enter the sequence names u, v, or w, press y [u], y [v], or y [w] or t a.
. You can evaluate these names in any of three ways.
• Calculate the
nth value in a sequence.
• Calculate a list of values in a sequence.
• Generate a sequence with
u(nstart,nstop[,nstep]). nstep is optional; default is 1.